<div class="btn-group source-code" uib-dropdown>
  <button class="btn btn-default dropdown-toggle" title="代码" uib-dropdown-toggle>
    <i class="fa fa-list-alt"></i> <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" ng-class="{'dropdown-menu-right': position == 'right'}" uib-dropdown-menu>
    <li><a href="javascript:void(0)" ng-click="select('hr')">水平分隔线<hr></a></li>
    <li><a href="javascript:void(0)" ng-click="select('blockquote')"><blockquote>区块引用</blockquote></a></li>
    <li><a href="javascript:void(0)" ng-click="select('code')"><code>行内代码</code></a></li>
    <li><a href="javascript:void(0)" ng-click="select('blockcode')"><pre><code>多行代码</code></pre></a></li>
    <li class="divider"></li>
    <li><a href="javascript:void(0)" ng-click="select('html')">HTML源代码</a></li>
  </ul>
</div>
